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Class Information
Number: 187/393
Name: Elevator, industrial lift truck, or stationary lift for vehicle > With monitoring, signalling, and indicating means > Monitors operational parameter
Description: Subject matter wherein the physical condition checked or sensed is one which it is essential for anyone maintaining or using the elevator to know for the safe or proper functioning of the elevator (e.g., position, speed, direction).










Sub-classes under this class:

Class Number Class Name Patents
187/394 Load support position 199


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
5578801 Apparatus and method for sensing slippage of elevator drive cable over a traction sheave Nov. 26, 1996
5561277 Dual processor control system with continuous parallel interface integrity testing Oct. 1, 1996
5557546 Data acquisition system for the analysis of elevator trouble Sep. 17, 1996
5522480 Measurement pick-up to detect physical characteristics of a lift for people or freight Jun. 4, 1996
5513723 Double-masted crane with improved brake arrangement May. 7, 1996
5509505 Arrangement for detecting elevator car position Apr. 23, 1996
5487448 Device for monitoring a control unit Jan. 30, 1996
5476157 Elevator control system with elevator hoistway operation monitoring system and method Dec. 19, 1995
5459665 Transportation system traffic controlling system using a neural network Oct. 17, 1995
5441127 Elevator control apparatus Aug. 15, 1995
5435416 Determination of the number of persons entering and leaving an elevator car Jul. 25, 1995
5427207 Apparatus for rescuing passengers in a malfunctioning elevator Jun. 27, 1995
5424498 Elevator start jerk removal Jun. 13, 1995
5421432 Method and apparatus for controlling and automatically correcting the command for deceleration/stoppage of the cage of a lift or a hoist in accordance with variations in the operating data of Jun. 6, 1995
5400872 Counteracting horizontal accelerations on an elevator car Mar. 28, 1995
5398782 Remote monitoring system with variable period communication check Mar. 21, 1995
5392879 Electronic failure detection system Feb. 28, 1995
5379864 Magnetic system for elevator car lateral suspension Jan. 10, 1995
5374794 Elevator control valve assembly Dec. 20, 1994
5373123 Electromagnetic gaging of elevator rails and other structures Dec. 13, 1994
5368132 Suspended elevator cab magnetic guidance to rails Nov. 29, 1994
5367132 Centering control for elevator horizontal suspension Nov. 22, 1994
5354233 Emergency ventilation system for elevator cab Oct. 11, 1994
5345042 Elevator hitch load weighing tare compensation Sep. 6, 1994
5345046 Voice communication for elevator Sep. 6, 1994
5345048 Elevator speed check using constant ratiometric comparison Sep. 6, 1994
5343003 Recalibration of hitch load weighing using dynamic tare Aug. 30, 1994
5322144 Active control of elevator platform Jun. 21, 1994
5321217 Apparatus and method for controlling an elevator horizontal suspension Jun. 14, 1994
5321216 Restraining elevator car motion while the doors are open Jun. 14, 1994
5308938 Elevator active suspension system May. 3, 1994
5307903 Method and system of controlling elevators and method and apparatus of inputting requests to the control system May. 3, 1994
5306879 Load measuring apparatus for an elevator car Apr. 26, 1994
5304751 Elevator horizontal suspensions and controls Apr. 19, 1994
5294757 Active vibration control system for an elevator, which reduces horizontal and rotational forces acting on the car Mar. 15, 1994
5283399 Group control of elevator system improvement measures Feb. 1, 1994
5281774 Drive control unit for hydraulic elevator Jan. 25, 1994
5276292 Operation check device of dynamic brake circuit for elevator Jan. 4, 1994
5274203 "Smart" position transducer system for elevators Dec. 28, 1993
5266756 Control apparatus for hydraulic elevators using fuzzy logic and speed control Nov. 30, 1993
5243154 Apparatus for controlling a hydraulic elevator Sep. 7, 1993
5233139 Measurement of traction, operation of brake, friction safety gear, and cable forces of an elevator Aug. 3, 1993
5207298 Elevator rotary door interlock May. 4, 1993
5170021 Hydraulic elevator control system using a plurality of solenoid valves Dec. 8, 1992
5156239 Disc brake/load weighing assembly for elevator drive sheave Oct. 20, 1992
5144101 Control apparatus for elevator doors using velocity limiting circuits Sep. 1, 1992
5139113 Apparatus for detecting abnormalities in elevator motion Aug. 18, 1992
5107964 Separate elevator door chain Apr. 28, 1992
5074385 Call registration apparatus in an elevator system Dec. 24, 1991
5052522 Encoder installing structure Oct. 1, 1991

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